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AN174-24A
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 2.531 |
| Grip | 2 1/16 in |
| Head Height | Between 0.140 inches and 0.172 inches |
| Head Type | Hexagon |
| Industry Standards/Certification | AN174 |
| Length | 2 1/2, 2 17/32 in |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response or mil-s-6050 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6758 military specification 5th material response or ams 6300 assn standard 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-180-2758 |
| NSN | 5306-00-180-2758 |
| Surface Finish | 32.0 microinches grip, 63.0 microinches bearing surface of head |
| Thread Class | 3a |
| Thread Length | 0.469 |
| Thread Size | 0.2500-28 |
| Weight | 0.04 lb |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error